Wooden stave shoe



Aug. 27, 110.929. w, L, GLENN 1,726,147

WOODEN sTAvE SHOE Filed Nov. 3, 192'/ Patented Aug. 27, 1929.

PATENT OFFICE.

WILLIAM L. GLENN, OF CORTEZ, COLORADO.

WOODEN STAVE SHOE.

Application led November 3, 1927. Serial No. 230,877.

This invention relates to wooden stave shoes and more particularly tometal shoes for the staves of wooden conduit.

An important object of the invention is tol provide a device of thischaracter which may be very readily applied to the stave and requiresbut inexpensive alterations of the stave as at present constructed.

A further object of the invention is to produce a device of thischaracter which provides a tight seal between adjacent ends of stavesand further provides means of locking the ends of staves againstmovement with relation to adjacent staves between which the joint islocated.

These and other objects I attain by the construction shown in theaccompanying drawing, wherein for the purpose of illust-ration is showna preferred embodiment of my invention and wherein Figure l is a planview of a portion of a wooden conduit shoe, a stave shoe applied to thejoint between butt ends of staves in accordance with my invention;

Figure 2 is a sectional view on the line 2-2 of Figure 1;

Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4; is a perspective view of the shoe removed. y

Referring now more particularly to the drawing, the numeral 10 generallydesignates a main plate having extending from its outer and inner edgesat opposite sides thereof flanges 11 and 12 which are curved tocorrespond to the curvature at the inner and outer faces of the stave towhich the shoe is to be applied. The ends of the plate are radial to theflange 11 and the plate has upstanding 4o from each face thereof betweeneach pair of flanges 11 and 12 a longitudinally extending rib 13 whichis straight and preferably per.

pendicular to a radius bisecting the plate.

The ends of the ribs 13 project slightly beyond' the end edges of theplate, as indicated at 14.

In employing the shoe, the stave is formed across its end face with aslot 15 for the reception of the rib 13 and since the flanges 11 and 12are arcuately curved while the rib is straight, it willl be obvious thatthe shoe when placed in posit-ion upon the stave is held againsttransverse movement thereon, so that it is at all times properlycentered. The distance between the outer face of the flange 11 or innerwall flange and the inner face of the outer wall flange 11 is preferablymade equal to the thickness of the stave employed and the inner face ofthe stave is rabbeted, as at 16, to accommodate the flange 11, so thatwhen the conduit is complete, the inner surface thereof will be smoothand free from obstructions.

In assembling the staves, it will be obvious that the projection of theribs 13 beyond the ends of the shoe will provide an extended portionwhich may engage in the side face of an adjacent stave, as more clearlyshown in Figure 3 holding this stave against dis-k placement withrelation to the staves joined by the shoe and providing a sealtherebetween.

Since the construction hereinbefore set forth is capable of a certainrange of change and modification without materially departing from thespirit of the invention, I do not limit myself to such specificstructure except as hereinafter claimed.

I claim In combination, a stave having its inner and outer faces curved,a plate having its edges arcuately curved to conform to the curvature ofthe inner and outer edges of the stave, longitudinally curved flangesextending from opposite edges of the plate and at opposite sidesthereof, and a ribextending from each face of the plate between saidflanges, said rib being longitudinally straight, said stave having inits end face agroove for the reception of said rib, said rib being ofgreater depth than the flanges whereby it projects beyond the outerfaces thereof to permit initial enga-gement of the rib in the grooveofthe stave.

In testimony whereof I hereunto affix my signature.

WILLIAM L. GLENN.

